Kaori Domoto, an investigator belonging to Beast, is chasing down criminals with a force that puts any man to shame. One day, Kaori falls into a trap set by the organization she is pursuing and witnesses a certain person. It is Kimijima Mizuki, who was her rival when she was a member of the Ladies' gang. Mizuki, with whom she has a grudge, subjects Kaori to a humiliating punishment. Kaori's pride crumbles with a bang...